Math 8 Refresher 9

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4
• 2a + 2b + 4
• 8ab
• 4ab + 4

3x - 5x

• 2x
• 8x
• -2x
• 15x²

Combine like terms
3x + 2x + 3y - 7y

• 5x + 10y
• 5x + 4y
• 5x - 4y
• 5x -10y

Expand and simplify 4(7x + 3).

• 28x + 12

• 28x + 3

• 47x + 12

• 47x + 3

• 15

x⁸ / x²

• x⁴

• x¹⁶

• x^-6

• x⁶

• 7/ u³
• 7u¹¹
• 7u^1.75
• 7u³

(r⁴)⁶

• 10r
• r¹⁰
• 24r
• r²⁴

• 18

• 1

• 18x